CVE-2019-19726

2019-12-12T01:15:00
ID CVE-2019-19726
Type cve
Reporter cve@mitre.org
Modified 2019-12-27T23:15:00

Description

OpenBSD through 6.6 allows local users to escalate to root because a check for LD_LIBRARY_PATH in setuid programs can be defeated by setting a very small RLIMIT_DATA resource limit. When executing chpass or passwd (which are setuid root), _dl_setup_env in ld.so tries to strip LD_LIBRARY_PATH from the environment, but fails when it cannot allocate memory. Thus, the attacker is able to execute their own library code as root.